Concrete floor construction.



w. H. gBUfiK. CONCRETE FLOOR CONSTRUCTION.

APPLICATION FILED JUNE 17, 1910.

2 SHEETS-SHEET 1.

Patented Oct. 1, 1912.

w. H. BURL CONCRETE FLOOR CONSTRUCTION.

APPLIOATIOKIILED Jun: 11, mo.

Patelgted 0ct. 1,1912.

2 SHEETS-11231 2.

l lz'iiwazsas': fiVeiZEi J rrnn STATES PATENT oFFic WILLIAM BURK, OF-ST. LOUIS, MISSOURI, ASSIGNOR 'IO CORRUGATED BAR COM PANY, OF ST. LOUIS,MISSOURI, A CORPORATION OF MISSOURI.

GOITGRETE FLOOR CONSTRUCTION.

To all it may concern:

Be it known that I,VV1LLIAM H. BURK, a citizen of the United States, anda resident of the city of St. Louis and State 'of Missouri, haveinvented anew and useful Improvement in Concrete Floor Construc; tions,of which the following is a specificaance to stress they will vary inaccordance with the loads and stresses imposed upon them by theirposition in the structure and in their relation to the supports.-

It also consists in the constructions and arrangements of partshereinafter described and claimed. 1

In the accompanying drawings which form part of this specification andwherein like symbols ,refer to like parts wherever they occu Figure 1 isa plan of a floor embodying my invention; Fig. 2 is a cross sectionthereof on the line 2+2; 3 is a cross section of afloor provided with awooden floor covering; Fig. 4: is a p an of a modified construction of afloor embodying my invention; and Fig. 5 is a cross section on the line5-5 of Fig. 4.

In the construction illustrated in the accompanying drawings, thecolumns 1 arelocated to form rectangular bays. Extending from column tocolumn around four sides of Specification of Letters Patent.

Application filed June 17, 1910. Serial No. 567,348.

Patented Oct.'-1, 1912'.

tion can be satisfied in various ways. For instance, as illustrated inFigs-l to 3, in elusive, of the drawings, the beamsfin the outer ormarginal portion of the bay may be made wider and of relatively greaterstrength and load-sustaining capacity than the beams in the middleportion of the bay. In this case, all of the beams are oi even depth andthey are preferably spaced at equal intervals apart, in order that tiles4. i

of uniform size may be used therewith. In this construction it istheoretically desirable to make each beam in succession narrower thanthe one next adjacent to it outwardly therefrom; but for practicalpurposes, the innermost beams may be made of the same SlZ8-' In order totake care of the shearin stresses adjacent to the column, it is referable to form the corner portions 5 o the bays solid and to reinforcethe same in some suitable manner.

In the practical building of my construction, a flat or smooth-surfacedfalsework or centering is erected. The metal reinforce for therespective beams is then positioned above the falsework, and hollowtiles or blocks or other fillers 4 are then set on the falsework inproper position with respect to the metal reinforce. he concrete is thenfilled in and permitted to set and harden, being preferably monolithicwith the columns and the adjacent bays. By reason of the centering beingflat, the cost of building is comparatively small, {and the bay is ofeven depth throughout." The construction dispenses entirely with maingirders and gives a maximum head-room entirely free from obstruction.

In the construct-ion abbve described, theupper surface of the bayconsists partly of the tops of the concrete beams and partly of the topsof the tiles. As illustrated in Fig. 3, this construction may be coveredwith a layer of cement; or it may be covered or' finished in any otherdesirable manner.

The construction may also be varied by the use of tiles or filler blocksof varying depth'as shown in Fig. 5, so as to allow the upper part ofthe beams to be connectedI with a slab of concrete of such thickness asto secure the necessary compressive area in' the concrete. beams thatare most heavily stressed.

Obviously, the constructions herein described admit of considerablemodification without departing from my invention. Thus, all ofthe beamsmay be of uniform width, but reinfdrced proportionately to the stressescomputed for the region in whichthey are located. So, too, the beams maybe of uniform strength but spaced at increasing intervals toward themiddle of the bay. It is also noted that the bays or slabs may,obviously, be supported at two opposite or ally four sides by wallsinstead of columns at the corners thereof.

'What I claim is z 1. In a system of floor construction, supportsarranged to divide the floor into panels and a composite tile andconcrete slab resting thereon, said slab comprising series ofintersecting reinforced concrete beams of different widths crossing thefloor panels intermediate the supports, the wider beams being disposedadjacent to the margins of the panels.

2. A monolithic reinforced concrete building construction comprisingcolumns and a plurality of floor panels supported thereby, each panelhaving a plurality of groups of parallel beams arranged in twointersecting series, said beams being all of substantially even depthand each of said series comprising beams of different widths, the beamscrossing the middle portion of the panel being narrower than themarginal beams.

3. A rectangular floor panel comprising a series of reinforced concretebeams par allel with one of its sides and a second series of reinforcedconcrete beams intersecting those of the first series at right angles,each of said beams being of uniform depth and width but the width ofsome beams differing from the width of other beams of the same series,the wider beams of each series being arranged near the margins ofthe'panel.

4C. In a buildingconstruction, floor panels and supports therefor, saidpanels comprising series of intersecting reinforced concrete beams ofeven depth, the beams decreasing respectively in width progressivelyfrom the marginal edges toward the middle of the panel.

5. A system of floor construction comprising columns and rectangularpanels, each of said panels comprising a series of reinforced concretebeams crossing the same intermediate saidcolumns and parallel with twoof its sides, said beams being of substantially even depth but the beamsadjacent to the margins of the panel being wider than the inner beams.

6. A system of floor construction comprising columns and rectangularpanels, said panels comprising a series of reinforced con- Crete beamscrossing the same intermediate said columns and parallel with two of itssides, each of said beams being of substantially uniform sectionthroughout but successive beams being of different sectional area, thebeams of greater sectional area being arranged adjacent the margins ofthe panels.

. 7 A system of floor construction comprising supports and rectangularpanels resting thereon, each panel comprising series of intersectingreinforced concrete beams parallel with two of its sides, said beamsbeing of even depth but respectively of a width substantiallyproportional to the distance from the middle thereof to the center ofthe panel.

8. A composite tile concrete floor slab and supports therefor, saidsupports dividing the floor into bays, tile blocks having their bottomsflush with the lower surface of the slabspaced in intersecting rowsacross said bays, said tile blocks being of different heights, thespaces between the marginal rows of blocks in said bays being greaterthan the spaces between the central rows, and concrete filling in thespaces between and'over said tile blocks, said concrete filling beingflush with the upper surface of the slab and constituting intersectingseries of spaced beams lying partly above and partly between said tile.

9. A rectangular floor slab comprising series of intersecting reinforcedconcrete beams parallel with two of its sides, the amount ofreinforcement in the beam; of each series being greater in some than inothers so that the beams are of varying strength, the beams of greaterstrength be ing arranged adjacent to the margins of the slab.

10. A rectangular floor slab comprising series of reinforced concretebeams parallel with each of its sides, said beams intersecting theamount of reinforcement in the beams being greater in some than inothers so that the beams are' of varying strength, the beams of greaterstrength being arranged adjacent tthe margins of the slab and the innerbeams decreasing successively in strength.

11. A system of construction comprising supports and rectangular bayssupported thereby, each bay comprising series of intersecting reinforcedconcrete beams parallel with two of itssides, said beams being ofsubstantially even depth but the amount of reinforcement in the beamsbeing'greatcr. in some than in others so that the beams are of'varyingstrength, and arranged in the order of decreasing strength inwardly fromthe margins of the slab, and filler blocks fitted tightly between theadjacent beams.

12. A system of tile concrete floor construction comprising supports andrectangular tile concrete panels supported thereby,

each panel comprising separated rows of spaced tiles and series oflntersecting reinforced concrete beams filling the spaces lreetween saidtiles; the tiles in each row being; spaced apart all diiiorentdistances, the wider spaces bcing near the ends of the row.

f i. A. ,j slitlll ot' floor constrm'etion comprising supports andrectangular reinforced .rote panels supported thereon, said panelscomprising 2 series of beams parallel with two of its sid s said beamsbeing pro vided with reinforcing bars in their lower regions. th enumber of bars in the respective beams being varied, and there beingfewer bars in each successive beam, proceeding inwardly from themarginal. portions of the panels, and filler blocks fitted in. thespaces between the beams and integral With. said beams.

14. A system of floor construct-ion com- }iirising supports andrectangular panels resting thcreon, each panel comprising a plurality ofintersecting beams crossing the same intermediate said supports andarranged With their lower surfaces in the same plane,

reinforcing rods arranged in the lower re-..

gions of said beams, the amount of reintr).'(:ei'i1critin the beamsbeing greater in the beams adjacent the margins of the panels than inthe beams remote from the margins of the panels, the said beams beingconnected ith a slab or body of concrete builtintetherewith and actingas part of said 1501 the resistance of compressive id slab being thickerin some porpanels than. in other portions system c). floor constructionconisupports and a composite tile concrete 001 slab resting thereon,said slab comprising a plurality of concrete beams of diil'erent widthsarranged parallel to the edges of the bays defined by the supports, saidbeams being arranged progressively in order of: decreasing Width fromthe margins toward the middle of said bays, tile blocks of differentdepths fittedbetween adjacent beams, and concrete'filling over some ofsaid blocks and integral With said beams.

16. A. composite tile concrete floor panel comprising a. plurality oftile blocks arranged in intersecting series of spaced par allel rowsextending across said panel, the rows of tile near the margins of thepanel being spaced farther apart than the rows of tile crossing themiddle of the anal, the spaces between said tile being filled withconcrete forming intersecting parallel ribs of varying Widths, the Widthof said ribs varying with the changes in the s acing apart of the rowsof tile blocks a jacent thereto respectively.

17. A. system of floor construction comprising columns and quadrangularfloor slabs, said slabs comprising series of em bedded reinforcedconcrete ribs, each series being parallel with one of the sides of aslab and crossing the same intermediate said 001- umns, and rows ofspaced tiles of different sizes fitted between said ribs, the tiles inthe marginal rows being uniform in size and larger than the tiles in thecentral portions of the slabs.

Signed at St. Louis, Missouri, this 14th day of June, 1910.

p WILLIAM H. BURK. Witnesses: Y ALFRED E. Linn m, G. A. PENNINGTON.

